Balancing Reactions

This unbalanced equation represents a chemical reaction:

Pb(NO₃)₂ + NaI → NaNO₃ + PbI₂

What is the coefficient for NaI once the equation is balanced?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

Balance the following chemical reaction: SnO₂ + H₂ --> Sn + H₂O

• 2 SnO₂ + 2 H₂ --> 2 Sn + 2 H₂O

• SnO₂ + 2 H₂ --> Sn + 2 H₂O

• 2 SnO₂ + 3 H₂ --> 1 Sn + 2 H₂O

• SnO₂ + H₂ --> Sn + H₂O

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

AgNO₃ + Cu → Cu(NO₃)₂ + Ag

• 2 AgNO₃ + 2 Cu → 3 Cu(NO₃)₂ + 1 Ag

• 2 AgNO₃ + 1 Cu → 1 Cu(NO₃)₂ + 2 Ag

• 1 AgNO₃ + 2 Cu → 2 Cu(NO₃)₂ + 1 Ag

• 3 AgNO₃ + 2 Cu → 3 Cu(NO₃)₂ + 2 Ag

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

_P₄+_O₂ →  _P₂O₃

• 3 P₄+1 O₂ → 2 P₂O₃

• 1 P₄+1 O₂ → 2 P₂O₃

• 1 P₄+ 3 O₂ → 2 P₂O₃

• 1 P₄+ 2 O₂ → 3 P₂O₃

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

_Al + _HCl →_H₂ + _AlCl₃

• 2 Al + 2 HCl → 2 H₂ + 6 AlCl₃

• 3 Al + 3 HCl → 6 H₂ + 2 AlCl₃

• 1 Al + 1 HCl → 3 H₂ + 1 AlCl₃

• 2 Al + 6 HCl → 3 H₂ + 2 AlCl₃

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

_K + _Cl₂ →_KCl

• 2 K + 16 Cl₂ → 8 KCl

• 2 K + 1 Cl₂ → 2 KCl

• 3 K + 4 Cl₂ → 3 KCl

• 1 K + 1 Cl₂ →1 KCl

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance this equation,            Al₂O₃ ---> Al + O₂ 

• Cannot be balanced

• 2Al₂O₃ ---> 2Al + 3O₂ 

• 2Al₂O₃ ---> 4Al + 3O₂ 

• 3Al₂O₃ ---> 2Al + O₂ 

Tags

NGSS.MS-PS1-5

Which of the following is the balanced chemical equation that represents the chemical reaction of potassium and oxygen to produce potassium oxide?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance this equation.
_Mg + _Cl₂ --> _MgCl₂

• 2,1,1

• already balanced

• 1,2,1

• 1,1,2

Tags

NGSS.MS-PS1-5

Balance this equation:
_Zn + _HCl --> _ZnCl₂  + _H₂

• 1,1,2,1

• 1,1,1,2

• 1,2,1,1

• 2,1,1,1

Tags

NGSS.MS-PS1-5